Liner for metal caps



F815. 22, 1927. 1,618,490 T. L. TALIAFERRQ LINER FOR METAL CAPS Filed Nov. 15, 1924 i I M y Pazpflofln a I Z -Pate nte d Feb. 22, 1927.

'rnoms L. 'raLI aFEImo, or CHICAGO, ILLINOIS.

LINER FOB METAL cars.

- Application filed November 18, 1924. Serial No. 749,663.

The invention relates to liners for metal caps for containers of various kinds.

An object of the invention is to provide a liner for a metal closure for a container which is non-porous and moisture proof.

A further object ofothe invention is to rovide a liner of the above character wherein the face thereof exposed to the content of the container is provided with a surface coating of wax.

A still further object of the invention is to' provide a liner of the above character provided with a pulp board backingor support, and a paper facing, wherein the paper is caused to adhere to the pulp board by a layer of wax located between the same, and wherei-n the paper on the face thereof adjacent the content of the container is provided with a surface coating of wax.

These and. other objects will in part be obvious and will in part be hereinafter more fully disclosed.

In-the drawings Figure 1 is a (perspective view of the improved liner, an

Fig.- 2 is .an enlarged sectional view thereof. 7

- In my prior Patent No. 1,476,115, I have shown a liner for metal closure for containers, and also described the method of forming the same. The present application is directed to an improvement upon the liner disclosedin said prior patent. In said prior patent, the liner is formed of a pulp board support orbacking and a layer of oiled paper, which is united, to the pulp board by the aid of a combined layer of wax and gum which sticks the oiled paper to the pulp board. It is well known that oiled paper is porous and moisture can go therethrough. The oiled paper is formed from linseed oil which is absorbed by the paper and oxidized therein. While this makes a very eflicient liner for most purposes, there are times when it is desired to have a liner which is non-porous and which is moisture proof. To this end, I have devised a'liner which consists of a pulp board backing or support, and a layer of paper. The aper is coated on each side with a layer of wax which is melted and applied to the paper. The wax makes a surfacecoating on the paper which is nonorousand which is moisture proof. The pu p board is also coated with wax, and while the wax on the pulp board is heated, the paper with the coating of wax on both sides thereof, is placed against the pulp board and pressed thereagainst by pressure rolls. The wax on the paper and the wax on the pulp board, will adhere, and thus it is that the paper is secured to the pulp board by adhesion "and not by gluing or sticking as in my previous patent. Further more, the wax layer between the paper and the pulp board will have considerable body, and this body of wax will serve more or less as a cushion, taking up any irregulari ties in the glass, and insure a perfect seal.

The method of making the improved linerforms no part of the present application,

but is described and claimed in my co-pend-- ing application Serial N 0. 749,664, filed'November 13,1924.

Referring to the drawings, my improved liner consists of a disk of pulp board 1 which is provided with a coating of wax 2, preferably paraiiinwax, although other waxes may be used. This coating is applied while hot, and will form a layer on the surface of the pulp board. The pulp board is preferably coated .in long strips sufficiently wide to have the liners cut therefrom. The facing for the liner includes a paper strip 3 which is'provided with a coating of wax, such as parafiin .4, on one face thereof, and a coating of wax; such as paraflin 5, on the other face thereof. \Vhile either the coating 5 on the paper or the coating 2 on the pulp board are still warm or both, the two are pressed together by pressure rolls, which will cause the wax to adhere and thus firmly join the paper to the pulp board. The layer 4 of wax is on the face side of the liner which is adjacent the content of the container when the closure is applied thereto. The wax is melted and coated on the paper and makes a distinct surface which is nonporous and which is much more cleanly than an oiled paper liner, wherein the oil is absorbed by the paper and is oxidized-into the paper.

The layers 2 and 5 on the pulp board and paper facing, respectively, are really formed into one layer when the parts are pressed while the wax is still warm,.and this makes a. layerof some substantial thickness, which has afcushion effect. This will, of .course, take up irregularities in the parts bearing against the liner, and insure a perfect seal.

While I'have described the paper facing as secured to the pulp board through the wax layers adhering, one .to the other, it v will be understood, of course, that from certain aspects of the invention, the Wax covered aper may be secured to the pulp board by a ayer of Wax impregnated with a sticky gum, after the manner described in my prior patent.

Having thus described the invention, What I claim as new and desire to secure by Letters-Patent, is-

The herein described liner comprising a pulp board backing or support having a coating of Wax applied thereto, a layer of paper having a coating of mm on each side thereof, said Wax coated paper being applied to the wax coated surface of the pulp board and caused to adhere thereto solely through the adhesiveness of the wax, Whereby said liner is provided with a wax coating adjacent the content of the container and also with a distinct layer of Wax between the paper facing and the pulp board support which provides a cushion capable of yield ing to any irregularities in the' glass so as to insure a tight seal.

In testimony whereof, I affix my signature.

THOMAS L: TALIAFER-R'O. 

